Method of coating metal sheets.



\ PATENTED APR. 16 1907. L. G. STEELE.

7 METHOD OF COATING METAL SHEETS.

APPLIGATION FILED DBO. 19,1905.

2 SHEETS-SHEET 1.

"(VENT-OR WITNESSES PATENTED APR. 16, 1907.

L. U. STEELE.

METHOD OF COATING METAL SHEETS. APPLIGATION FILED DEO.19,1905.

WITNESSES .2 SH EETSSHEET 2.

I UNITED sTATEs I PAIENT oEEicE.

LAWRENCE c. sTEELE, or W EELING, wEsT VIRGINIA-ASSIGNOR TO AMERICAN SHEET'& TIN 'PLATE COMPANY, OF PITTSBURG, PENN- SYLVANIA, A CORPORATION OF NEW JERSEY.

METHOD OF COATING ME TAL SHEETS.

Specification of Letters'Patent.

- Patented. April 16, 1907.

Application filed December 19, 1905. Serial No. 292,462.

To all whom it may concern:

Be it known'that I, LAWRENCE C. STEELE, of Wheeling, Ohiocounty, West Virginia, have invented a new and useful Method of Coating Metal Sheets, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification,.in.

which- I Figure 1 is a longitudinal section showing a tinning-pot provided with my improved apparatus. .Fig. 2 is a to plan view of the same, and Fig. 3 is a detai view of the spraying devices.

--My invention relates to the coating of sheets with metal, and especially to the making of tin-plate, though it may be used in galvanizing sheets or coating them with other metals.

Heretofore after the sheet has fed up through the last air of rolls in the bathof tin it has passed between a pair of plain rolls, which turned in the oil floating on the top of the bath. These last rolls were pressed together, so that they squeezed the surplus I, tin from the sheetand made the coating more uniform. By the use'of such apparatus the s eed of the sheet-feeding was necessarily s ow and the amount of the coating could not be controlled as desired. Furthermore, as the squeezing-rolls acted upon 'the coating while hot and green they affected the gloss and injured the appearance of the sheets.

My invention is designed to provide a method whereby the amount of the coating can be better controlled. It is also designed -to provide for driving the machine at a higher speed than was possible with the old method and also to give an oil-finish to the plate by which its appearance is improved.

My invention consists, broadly, in driving a liquid, preferably in a heated condition,

against the coated face of the plate as it rises from the coating-bath. I have found by experiment that where a liquid, such as oil, is thus forced against the face of the plate the amount of metal on the plate may e regulatedby regulating the force'of the liquid driven against the plate-face. The liquid may consist of the coating metal itself in molten condition or it may be another liquid, such as oil, whether heated or cold.

i In the drawings, in which I show a preferred form of the apparatus as applied to the manufactureof tin-plate, 2 represents a tinning-pot of any desirable type, 3 3 being the last pair of tinning-rolls. I

Tne oil-rolls which have heretofore been employed, and which rotate in the oil lying thus adjusting tne size of the jet-opening 4, through which the liquid is forced downwardly and outwardly in a continuous sheet. In the form shown the liquid-tin bath may extend to about the level a a, while the oil will extend up to about the level I) b. The

hot oil thus'lying on the bath is pum ed up through the pipe 8 into the centrifuga pump 9 and is discharged through the pipes 10 and 11. Each of these pipes leads to one of the jet devices, being preferably joined into the lower plate, as shown.

In the operation of the device the pump- Inay be driven by a belt extending to pulley 12 or in any other. suitable manner and w act to continuously pump up the hot 011 from the top of the bath and drive it through the jet devices in the form of sheets, which strike the opposite faces of the-rising plates at a downward angle. These sheets of ollmay either strike the plate above thelevel where it leaves the oil-bath or substantially at this level or even below it. The action of the'hot oil is to wipe or driveofl? a portion of the coata ing metal, the amount which is removed depending upon the regulation of the ets as to speed, size, volume of fluld, ressure &c.- In order to prevent the oi which 1s driven down upon the sheet-faces from runmng down upon the rolls 3, I preferably employ the curved spring-shields 13, WhlCll are se-- Y cured at their ends to brackets 14 in the oilbath and which are curved upwardly and preferably fit together with light pressure in line with the nip of the rolls 3. As the tin sheet feeds upwardly it will be forced between these spring-guards, while the oil and metal will be deflected outwardly as they more rapidly than with the old method, since dil-rolls being there is no danger of carrying the metal around and redepositing it on the plate, the

referably done. away with. The plates are of fine quality and appearance, since doing away with the oil-rolls prevents dryness or dimming of the gloss of the coating.

- The liquid forced against the sheet may consistof the coating metal itself or of any other liquid, whether hot or cold. The invention is ap licable to the coating of sheets with any meta The means for forcing the jet against the face may be varied, as may the other parts of the apparatus, without departing from my invention. I

I claim 1. The method of coating metal plates or sheets, consisting in feeding them upwardly from a molten-metal coating-bath, and forcing'a liquid against the face of the upwardlymoving plate, above and after it leaves the molten-metal bath; substantially as described.

2. The method of coatingmetal plates or 5 sheets, consisting in feeding them upwardly forcing a jet or sheet of liquid against both faces of the plate after it leaves and while it is from a molten-metal coating-bath, and forcing a liquid against the face of the upwardlymoving plate, above and after it leaves the molten-metal bath; substantially as described. v

3. The method of coating metal plates or sheets, consisting in feeding them upwardly through asbath ofvmolten coating metal, and

moving upwardly above the molten-metal bath; substantially as described. 4. In the process of coating metal plates with molten metal, the step consisting of driving a jet or sheet of liquid against the face of the plate as the successive portions of the plate leave a coating-bath; substantially as described.

5. In the process of coating metal plates with molten metal, the step consisting of driving a downwardly-directed sheet of liquid against the face of the plate as it is moved -upwardly.above a coating-bath; substantially as described.

6. In the process of coating metal plates with molten metal, the step consisting of driving a sheet or jet of liquid other than the coating metal against the face of the plate after it has left and as it is moving upwardly above the molten-metal coating-bath; substantially as described.

7. The method of tinning, consisting in feeding the plate upwardly from the moltenmetal bath through oil, and forcing the oil against the face of the plate substantially as described.

8. The method of tinning, consisting in feeding the plate upwardly from the moltenmetal bath through oil, and forcing sheets of hot oil against the opposite faces of the rising plate; substantially as described.

. 9 The method of tinning, consisting in feeding the plate upwardly from the moltenmetal bath through oil, and pumping oil from the bath and driving it against the faces of the rising plate; substantially as described.

10. The method of coating metal sheets or plates, consisting in feeding them upwardly from a molten-metal coating-bath, and forcing a heated liquid against the face of the plate, after it-leaves the molten-metal bath substantially as described.

In testimony whereof I have hereuntoset my hand.

L. C. STEELE.

Witnesses:

JOHN MILLER, H. M. CoRwIN. 

